cocos2d-x3.0 often use drawing methods

HelloWorldScene.h

For example, the following code is added:

Protected:    void OnDraw (const KMMAT4 &transform, bool transformupdated);    Customcommand _customcommand;

HelloWorldScene.cpp

void HelloWorld::d Raw (Cocos2d::renderer *renderer, const KMMAT4 &transform, bool transformupdated) {_customcommand    . init (1);    _customcommand.func = Cc_callback_0 (Helloworld::ondraw, this,transform,transformupdated); Renderer->addcommand (&_customcommand);}    void Helloworld::ondraw (const KMMAT4 &transform, bool transformupdated) {Kmglpushmatrix ();            Kmglloadmatrix (&transform);    /* Straight line */Check_gl_error_debug ();            Drawprimitives::d rawline (Visiblerect::leftbottom (), Visiblerect::righttop ());        Check_gl_error_debug ();    Gllinewidth (5.0f);    DRAWPRIMITIVES::SETDRAWCOLOR4B (255,0,0,255);    Drawprimitives::d rawline (Point (0, 0), point (100, 100));    Draw big Point in the center Drawprimitives::setpointsize (64);    DRAWPRIMITIVES::SETDRAWCOLOR4B (100, 0, 255, 128);     Drawprimitives::d rawpoint (Visiblerect::center ());            Check_gl_error_debug (); Draw 4 small points point points[] = {point (60,60), point (70,70), point (160,70), point (170,60)};    Drawprimitives::setpointsize (10);    DRAWPRIMITIVES::SETDRAWCOLOR4B (0,10,255,255);        Drawprimitives::d rawpoints (points, 4);        Check_gl_error_debug ();    Draw a green circle with ten segments gllinewidth (16);    DRAWPRIMITIVES::SETDRAWCOLOR4B (0, 255, 0, 255);        Drawprimitives::d rawcircle (Visiblerect::center (), 0, N, false);    Check_gl_error_debug ();    Draw a green circle with the segments with line to center Gllinewidth (2);    DRAWPRIMITIVES::SETDRAWCOLOR4B (0, 255, 255, 255);        Drawprimitives::d rawcircle (Visiblerect::center (), Max, Cc_degrees_to_radians (+), and false);                    Check_gl_error_debug ();    Draw a pink solid circle with segments Gllinewidth (2);    DRAWPRIMITIVES::SETDRAWCOLOR4B (255, 0, 255, 255);        Drawprimitives::d rawsolidcircle (Visiblerect::center () + point (140,0), Max, Cc_degrees_to_radians (n), 1.0f, 1.0f);                    Check_gl_error_debug (); Open Yellow Poly    DRAWPRIMITIVES::SETDRAWCOLOR4B (255, 255, 0, 255);    Gllinewidth (5);    Point vertices[] = {point (10,10), point (50,50), point (100,50), point (150,100), point (200,150)};        Drawprimitives::d rawpoly (vertices, 5, false);        Check_gl_error_debug ();    Filled Poly gllinewidth (1);    Point filledvertices[] = {point (0,120), point (50,120), point (50,170), point (25,200), point (0,170)};        Drawprimitives::d rawsolidpoly (Filledvertices, 5, color4f (0.5f, 0.5f, 1, 1));    Closed Purble Poly drawprimitives::setdrawcolor4b (255, 0, 255, 255);    Gllinewidth (2);    Point vertices2[] = {point (30,130), point (30,230), point (50,200)};        Drawprimitives::d rawpoly (Vertices2, 3, true);                            Check_gl_error_debug (); Draw Quad Bézier path drawprimitives::d rawquadbezier (Visiblerect::lefttop (), Visiblerect::center (), Visiblerect::        Righttop (), 50);            Check_gl_error_debug (); Draw cubic Bézier path drawprimitives::d RawcubicbeziER (Visiblerect::center (), point (Visiblerect::center (). X+30,visiblerect::center (). y+150), point (Visiblerect::        Center (). X+60,visiblerect::center (). y-300), point (Visiblerect::center (). X+90,visiblerect::center (). y+150), 100);            Check_gl_error_debug ();    Draw a solid polygon point vertices3[] = {point (60,160), point (70,190), point (100,190), point (90,160)};        Drawprimitives::d rawsolidpoly (Vertices3, 4, color4f (1,1,0,1));        Check_gl_error_debug (); End Draw Kmglpopmatrix ();}

cocos2d-x3.0 often use drawing methods